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地球核心的“大铁球”似乎比地球其它地方旋转得更快。最近出版的《科学》杂志报道说,来自哥伦比亚大学拉蒙特一多尔蒂地质观测所和伊利诺伊大学的科学家称,直径2414公里的地核每年要比地球
The “big iron ball” at the heart of the Earth seems to spin faster than anywhere else on the planet. A recent issue of Science reported that scientists from the Lamont-Dole Tropics Institute at Columbia University and the University of Illinois say the 2,414-kilometer diameter core